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Evaluation Of Truck Lane Restrictions In Virginia
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Book Synopsis Identifying the Impact of Truck-lane Restriction Strategies on Traffic Flow and Safety Using Simulation by : Qun Liu
Download or read book Identifying the Impact of Truck-lane Restriction Strategies on Traffic Flow and Safety Using Simulation written by Qun Liu and published by . This book was released on 2007 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The continuous growth of freight transportation over recent years has resulted in an increasing proportion of commercial vehicles on our nations' highways which has led to higher truck volumes and more severe truck-related crashes every year. Safety proponents have therefore been advocating for more restrictions to be placed on these commercial vehicles in order to reduce the interaction of these larger vehicles and passenger cars. A popular strategy is the use of different lane restrictions for trucks. However, the effectiveness of these restrictions for trucks differs from case to case due to unique factors of each site, including the type of restriction used, traffic conditions and the geometric characteristics at the site. This has motivated the author to conduct this study to evaluate the impact of these restrictions on traffic operations and safety on freeways with different traffic and geometric characteristics. For the safety evaluation, this research measures the impact of different truck lane restriction strategies (TLRS) using conflict as the measurement of effectiveness (MOE). Conflict has been proven to be highly related to traffic crushes on freeways (FHWA, 1990; Sayed and Zein, 1999; Kaub, 2000). The high frequency of conflicts has also made it possible to collect adequate data for statistical analysis. The MOEs used to evaluate the impact of different lane restrictions on operational performance were lane changes, average speed, speed distribution, and volume distribution. Due to the lack of existing highway locations with different lane restrictions considered in this study, the conflict data were collected using a traffic simulation tool - PARAMICS V3.0 (Quadstone Ltd., 2000), which can simulate the emergent interaction between vehicles but not random crashes on the road network. The effectiveness of different lane restrictions in terms of the above MOEs were evaluated for 14,400 different simulation scenarios by varying lane restriction strategies, traffic conditions (volume, truck percentage) and geometric characteristics (gradient, speed limit, interchange density). The simulation results showed that all the geometric and traffic characteristics had a significant impact on freeway safety and operation. In addition, truck percentage and volume were identified as key factors that had a significant impact on the selection of the optimal truck lane restriction strategy. The ANOVA analyses indicated that the degree of effect of truck lane restriction strategies on safety intensify with the increase in truck percentage and traffic volume. Optimal alternatives of truck lane restriction strategies under different truck percentages and volumes were identified with the objective of reducing traffic conflicts and enhancing LOS (level of service). Guidelines were then developed for the application of truck lane restrictions under alternative traffic and geometric conditions.
Book Synopsis An Operational Evaluation of Truck Restrictions on Six-lane Rural Interstates in Texas by : Michael C. Zavoina
Download or read book An Operational Evaluation of Truck Restrictions on Six-lane Rural Interstates in Texas written by Michael C. Zavoina and published by . This book was released on 1990 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the increased expansion of rural Interstates to six lanes, questions have arisen as to the proper operational strategy of those facilities. One approach is to restrict trucks and other large vehicles from one or more of the lanes. The effects of such a restriction, however, have not been extensively studied. This study analyzes the operational effects of three left-lane truck restrictions on six-lane rural Interstates in Texas. Although the directional distribution of trucks changed significantly, no effects were found on the directional distribution of cars, the time gaps between vehicles, or the speeds of either cars or trucks that could be attributed to the truck restriction.
Book Synopsis 108-1 Hearing: Truck Safety and Freight Mobility, (108-15), March 24, 2003, * by :
Download or read book 108-1 Hearing: Truck Safety and Freight Mobility, (108-15), March 24, 2003, * written by and published by . This book was released on 2004 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Highways, Transit, and Pipelines Publisher : ISBN 13 : Total Pages :134 pages Book Rating :4.F/5 ( download)
Book Synopsis Truck Safety and Freight Mobility by : United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Highways, Transit, and Pipelines
Download or read book Truck Safety and Freight Mobility written by United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Highways, Transit, and Pipelines and published by . This book was released on 2003 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidelines for Truck Lane Restrictions in Texas by : Debbie Jasek
Download or read book Guidelines for Truck Lane Restrictions in Texas written by Debbie Jasek and published by . This book was released on 1997 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impact of Left Lane Truck Restriction Strategies on Multilane Highways in Louisiana by : Mini Radhakrishnan
Download or read book Impact of Left Lane Truck Restriction Strategies on Multilane Highways in Louisiana written by Mini Radhakrishnan and published by . This book was released on 2009 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Separation of Vehicles by : Cambridge Systematics
Download or read book Separation of Vehicles written by Cambridge Systematics and published by Transportation Research Board. This book was released on 2010 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: NCHRP Report 649/NCFRP Report 3: Separation of Vehicles - CMV-Only Lanes presents an extensive compendium of information about CMV-only lanes and examines major issues and concepts that should be understood in developing new applications of CMV-only lane concepts as a potential method for both easing congestion and reducing the number of traffic accidents on highways. Appendices to this report, including an annotated literature review, performance evaluation criteria, benefits monetization factors and unit costs, and net present value calculations for benefit-cost analysis, are available on the TRB website. This report and the supplemental information can be used by public agencies that may be considering CMV-only lane concepts in corridor studies or other planning applications. The report provides data such agencies can use to support their own evaluations of CMV-only lane projects.
Book Synopsis Monitoring of Texas Vehicle Lane Restrictions by : Darrell W. Borchardt
Download or read book Monitoring of Texas Vehicle Lane Restrictions written by Darrell W. Borchardt and published by . This book was released on 2004 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monitoring and Evaluating Managed Lane Facility Performance by : Jodi Louise Carson
Download or read book Monitoring and Evaluating Managed Lane Facility Performance written by Jodi Louise Carson and published by . This book was released on 2005 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Truck Restriction Evaluation by : Fred L. Mannering
Download or read book Truck Restriction Evaluation written by Fred L. Mannering and published by . This book was released on 1993 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Highway/heavy Vehicle Interaction by : Douglas W. Harwood
Download or read book Highway/heavy Vehicle Interaction written by Douglas W. Harwood and published by Transportation Research Board. This book was released on 2003 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 3: Highway/Heavy Vehicle Interaction reports on the safety interactions of commercial trucks and buses with highway features and on highway improvements that can be made to improve the safety of heavy vehicle operations.
Download or read book Transportation Research Record written by and published by . This book was released on 1997 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Case Studies and Annotated Bibliography of Truck Accident Countermeasures on Urban Freeways by :
Download or read book Case Studies and Annotated Bibliography of Truck Accident Countermeasures on Urban Freeways written by and published by . This book was released on 1994 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: To address the growing problem of congestion caused by incidents, especially truck-involved incidents, this study was undertaken to identify truck accident countermeasures which have been used nationwide. Desired conditions surrounding implemented countermeasures in this study included urban freeway volumes of 95,000 vehicles per day or higher, a significant number of trucks in the traffic stream (typically 5% or more), and countermeasures involving road design. The study omitted countermeasures directly related to the vehicle and the driver. This project included the following steps: literature search, telephone survey, and field visits to selected sites. The information collected by this project is intended to assist agencies in identifying, selecting, and implementing truck accident countermeasures. Information was gathered on the following truck accident countermeasures: lane restrictions, separate truck roadways, urban inspection stations, ramp treatments, major incident response and clearance, and truck bans/diversion and time restrictions.
Download or read book Virginia Law Review written by and published by . This book was released on 1921 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Simulation Analysis of Traffic Flow Elements for Restricted Truck Lanes on Interstate Highways in Virginia by : Lester A. Hoel
Download or read book A Simulation Analysis of Traffic Flow Elements for Restricted Truck Lanes on Interstate Highways in Virginia written by Lester A. Hoel and published by . This book was released on 1999 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, increases in truck traffic on Virginia's highways have raised issues concerning safety and capacity on interstates such as I-81 and I-95. Lane restrictions represent a strategy that is intended to reduce conflicts between trucks and cars and facilitate traffic flow. Field experiments to determine the effects on existing traffic under lane restrictions for an interstate freeway segment are usually not feasible, and an alternative approach was selected. In this study, the simulation model FRESIM was used to estimate various traffic flow elements. The purpose of this study was to analyze changes in traffic flow elements (density, lane changes per vehicle, and speed differential) under conditions of restricted and unrestricted truck lane configurations. Prior to application of the simulation model to actual sites in Virginia, a scenario analysis was completed. The scenario analysis tested the variability of each traffic flow element considering the following variables: traffic volume, percentage of trucks, percentage of total volume by lane, presence or absence of lane restrictions, and grade. A statistical paired-sample t test was used to determine significant differences in the values of the three traffic flow elements when lane restrictions were applied. An analysis was also completed for three case studies in Virginia, located on I-81 near Buchanan, Christiansburg, and Wytheville. Two types of restrictions were tested: restricting trucks from the left lane and restricting trucks from the right lane. From the results obtained in this study several conclusions were drawn: (1) restricting trucks from the left lane with steep grades causes an increase in speed differential and may decrease density and the number of lane changes, (2) restricting trucks from the right lane causes an increase in the number of lane changes, and (3) site characteristics dictate the effects of truck lane restrictions. Based on the results of this study, it is recommended that (1) trucks be restricted from the left lane when grades are 4 percent or greater and (2) trucks not be restricted from the right lane. The study results did not support removal of truck lane restrictions in Virginia.
Book Synopsis Impacts and Effectiveness of Truck Lane Restrictions by : Sompong Sirisoponsilp
Download or read book Impacts and Effectiveness of Truck Lane Restrictions written by Sompong Sirisoponsilp and published by . This book was released on 1988 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Case Studies and Annotated Bibliography of Truck Accident Countermeasures on Urban Freeways. Final Report by : Dan R. Middleton
Download or read book Case Studies and Annotated Bibliography of Truck Accident Countermeasures on Urban Freeways. Final Report written by Dan R. Middleton and published by . This book was released on 1994 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
